This may be footage of "Operation Alert" in 1956 in Indiana. Article in the Google News archive
. Listed in the National Archives as "Civil Defense Scenes, circa 1950." National Archives description: "Summary: HLS, people rushing thru streets.
HLS, automobile traffic thru town.
CU, rotating red light on roof of Civil Defense car.
Pan, Civil Defense vehicles in yard. Small boy with toy rifle pointing it at camera. Civil Defense workers on rooftops. Gas station attendants hear alert sounded, put on steel helmets and rush off. Air-to-air view. Army captain in helicopter speaking over radio.
Int, CD communications center. Men at phones."
National Archives Identifier: 29812